Contradiction with Genesis 18:25
Genesis 18:25 discusses the justice of God in not destroying the righteous with the wicked, contradicting with Genesis 20:9 where Abimelech accuses Abraham of bringing a great sin on him and his kingdom due to Abraham's deception, implying an unfair treatment.
Genesis 18:25: That be far from thee to do after this manner, to slay the righteous with the wicked: and that the righteous should be as the wicked, that be far from thee: Shall not the Judge of all the earth do right?
Contradiction with Proverbs 6:16-19
These verses list things that the Lord hates, including a lying tongue and a heart that devises wicked plans. Abraham's deception in Genesis 20:9 could be seen as a contradiction to this moral teaching.
Proverbs 6:16-19: These six [things] doth the LORD hate: yea, seven [are] an abomination unto him: [unto...: Heb. of his soul]
Contradiction with Exodus 20:16
Exodus 20:16 states, "Thou shalt not bear false witness," which contradicts Abraham's deception about Sarah being his sister.
Exodus 20:16: Thou shalt not bear false witness against thy neighbour.
Paradox #1
The historical issue with Genesis 20:9 is that it involves Abraham once again saying his wife Sarah is his sister to protect himself, which is a repeat of a similar earlier event with Pharaoh in Egypt (Genesis 12). This repetition raises questions about the historical accuracy or consistency of the narrative, as it seems unlikely for the same event to happen twice with very similar details and outcomes.